Transtech Transputer, User Manual

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Description
64
Transputer Motherboard User Manual TMB M 711
Figure 50 summarizes for the case of the link area.
6.3.2 IRQ & DMA Selection
The interrupt request level and DMA channel used are programmed
by writing to 4bits in the IRQ and DMA channel select register. At
base a#14. This is a read/write register so that the
programmed selection can be read back. The register coding is as
shown in figure 51 and figure 52
module 0: edge connector
source of control -
modules 1 to 9: same as module0
module 0: host PC
source of control -
modules 1 to 9: module0’s subsystem
Figure 50. Control configuration (link)
S4 S5
on on
S4 S5
off off
Figure 51. IRQ Channel select.
Bit 1
Bit 0 IRQ
0
0
1
1
0
1
0
1 3
5
11
15
- reset value